| Index | Castaic | California | National |
| Average Test Scores | 53% | 43% | 48% |
| Student/Teacher ratio | n/a | 20:1 | 16:1 |
| Total public schools | n/a | 8,308 | 79,221 |
| Total private schools | n/a | 3,438 | 24,874 |
| Total post-secondary schools | n/a | 1,085 | 7,963 |
| Index | Castaic | California | National |
| Completed 8th grade | 90.5% | 81.1% | 84.3% |
| Completed high school | 90.2% | 79.8% | 83.0% |
| Completed some college | 72.0% | 61.5% | 59.4% |
| Completed associate degree | 44.6% | 39.8% | 38.5% |
| Completed bachelors | 34.2% | 32.0% | 30.3% |
| Completed masters | 9.1% | 11.9% | 11.5% |
| Completed professional degree | 2.0% | 3.9% | 3.3% |
| Completed doctorate | 0.8% | 1.6% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Castaic. Using the proficiency score averages, the average test scores for Castaic, CA schools is 53%. The average student to teacher ratio is n/a. In Castaic, CA, an average of 90.5% of students have completed 8th grade and an average of 90.2% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Stevenson Ranch, CA | 18,980 | 81% | 67.7% |
| Santa Clarita, CA | 212,519 | 56% | 16.4% |
| Moorpark, CA | 36,443 | 56% | 16.3% |
| Lake Hughes, CA | 660 | 47% | 2.1% |
| Simi Valley, CA | 125,768 | 38% | 21.4% |
| Castaic, CA | 18,479 | 53% | 9.6% |
| City | Population | Avg. Test Scores | National Avg. |
| Brook Park, OH | 18,486 | 68% | 42.2% |
| Orange, TX | 18,458 | 39% | 19.6% |
| Terrell, TX | 18,513 | 34% | 28.6% |
| Chowchilla, CA | 18,443 | 38% | 21.9% |
| Durant, OK | 18,516 | 40% | 17.5% |
| Castaic, CA | 18,479 | 53% | 9.6% |
Here are the best places to live in California
Check out the 10 safest cities in California
See the best places to live in Castaic
Check out the 10 most dangerous cities in California